After-sales Service

Issue: The stereo does not fully shut down after turning off the ignition. Symptoms may include:

• The stereo can still be powered on after removing the car key.
• Button backlight stays illuminated.
• CarPlay / Android Auto remains connected when the vehicle is off.

Cause: This is usually not caused by the head unit. It is commonly related to an outdated CAN Gateway version that does not transmit the shutdown signal correctly.

Diagnosis checklist:

1. Headlight sync test:
   Turn the headlight knob on/off and check if the stereo button backlight turns on/off accordingly.
   If yes, CAN signal is partially working.
2. Bluetooth test:
   Check whether Bluetooth works normally.
   If yes, some CAN signals are working, but shutdown communication may be missing.

Solution: Use our yellow “power drain fix wire”.

1. If the yellow wire was not included in your package, contact us and we will send it free of charge. (service@scumaxcon.com)
2. Follow the wiring instruction video below to connect the yellow wire correctly.

Issue: Steering wheel controls do not work on vehicles equipped with the 8-button steering wheel (see reference image).

Cause: This steering wheel type usually requires an additional steering wheel control decoder (CAN simulator) to communicate correctly with the head unit.

Required Part:

YX2219 – Steering Wheel Control Simulator / Decoder
https://www.scumaxcon.com/products/rcd330-510-multifunctional-wheel-control-simulator-adapter-cable-for-vw-golf-caddy-passat-caddy-polo

Wiring Instruction Video:

https://youtu.be/fkrc_-WJIss

Note: If You Also Experience Battery Drain

In some cases, installing the YX2219 decoder can help improve CAN communication and may reduce battery drain.

If battery drain still occurs after installing the decoder, please use our yellow power drain fix wire.

👉 Click here to jump to the Battery Drain / Yellow Wire solution

Yellow Wire Installation Video:

https://youtu.be/SfY-WQkZtpg

Issue: The rear camera does not display properly or does not activate when shifting into reverse.

Important Check (Before Troubleshooting)

1. Please confirm you selected the RCD360 PRO3S version with rear camera function activated. If you purchased the deactivated version, the rear camera function can be activated via VCDS.
2. After installing the camera, close the trunk and test again.

Camera Not Working — Please Identify Your Situation

1) Factory RGB Camera

1.1 Factory RGB camera (without trajectory)

RGB to AV Converter Cable

1.2 Factory RGB camera (with trajectory)

OEM RGB Camera Adapter (Trajectory Version)

2) Original Head Unit Was MIB System

Factory camera is usually directly compatible with RCD360 series.

3) Aftermarket / Third-Party Rear Camera

• AV (CVBS) signal
• NTSC system
• Designed for OEM head units

If You Are Still Unsure

Send us photos of your setup at service@scumaxcon.com

Issue: Weak or no FM/AM signal.

• Weak signal
• Few stations found
• Static noise

Radio specs:

• AM: 530 – 1600 KHz
• FM: 87.5 – 108 MHz

Solutions:

1. Check antenna connection and orientation.
2. If needed, use an adapter.

Double Fakra Adapter | Double Separate Fakra Adapter